What Is Collate In Printing And Its Critical Role In Production

Types of Collation Methods in Printing

The three primary collation methods—automatic, semi-automatic, and manual—serve distinct roles in production workflows, each optimized for specific output scales and material properties. Additionally, niche techniques like saddle-stitch or perfect-binding collation address unique binding requirements, often integrating specialized equipment to ensure structural integrity. Technical specifications such as sheet size (A4, letter, tabloid), paper type (coated, uncoated, recycled), and finish (glossy, matte) directly impact the feasibility and efficiency of collation processes.

Automatic Collation in High-Volume Printing

Technical specifications influencing method selection include:

Automatic collation reduces labor costs and minimizes errors but requires significant upfront investment and maintenance. Digital presses (e.g., HP Indigo, Xeikon) often pair with automated collators to support variable data printing (VDP) without sacrificing speed.

Semi-Automatic Collation for Mid-Volume and Hybrid Workflows

Key components include:

Technical limitations include:

Semi-automatic collation is common in commercial print shops handling diverse client needs, such as wedding invitations with embossed covers or technical manuals with laminated pages.

Manual Collation for Low-Volume and Specialized Projects

Equipment includes:

Challenges include:

Manual collation is often paired with digital short-run presses (e.g., Epson SureColor, Roland BN-20) for on-demand projects where setup time outweighs automation benefits.

Collation Techniques for Specific Binding Methods

• Saddle-Stitch Collation Workflow: Sheets are folded into signatures (e.g., 4, 8, 16 pages) and collated in stacks before being fed into a saddle-stitch machine. The stitching process aligns signatures by their fold, ensuring proper spine alignment.
  Equipment: Automatic saddle-stitch collators (e.g., Muller Martini, Bobst) with pre-folders and stitching units. Manual methods use hand-operated stitchers for prototypes.
  Key Considerations:
  
• Page count limitations (typically 16–64 pages per signature).
• Paper weight constraints (60–120 gsm for standard stitching).
• Spine thickness affects stitch visibility and durability.
• Perfect-Binding Collation Workflow: Sheets are collated into signatures, then gathered into a "book block" before being glued to a cover. The collation must account for spine thickness and page order to prevent misalignment during trimming.
  Equipment: Perfect-binding collators with spine-forming trays (e.g., Muller Martini Perfecta) or manual stacking tables with alignment guides.
  Key Considerations:
  
• Spine width calculations (e.g., 0.5mm per sheet for standard paper).
• Adhesive compatibility (PVA or hot-melt glue for different substrates).
• Cover material (hardcover vs. softcover affects collation sequence).
• Spiral-Bind Collation Workflow: Sheets are collated into signatures, then stacked with a pre-punched spiral (wire or plastic) inserted through aligned holes. Precision is critical to avoid binding misalignment.
  Equipment: Spiral collators with hole-punching units (e.g., Akiles, TOSHIBA TECH) or manual punch-and-insert systems.
  Key Considerations:
  
• Hole alignment tolerance (±0.5mm for standard spirals).
• Material thickness (wire spirals handle up to 200 gsm; plastic spirals are lighter).
• Page count flexibility (unlimited, but spine thickness increases with pages).
• Thermal-Binding Collation Workflow: Sheets are collated and stacked with a thermal cover, which is heated to melt adhesive strips along the spine. Requires collation precision to prevent adhesive bleed or misalignment.
  Equipment: Thermal binders with integrated collation trays (e.g., GBC, TOSHIBA TECH).
  Key Considerations:
  
• Cover material (polypropylene or PVC for heat resistance).
• Spine thickness uniformity (affects binding strength).
• Limited to 100–300 pages per book block.
• Case-Binding Collation Workflow: Signatures are collated into sections (e.g., 8, 16, or 32 pages) and sewn or glued into a book block, which is later encased in a hardcover. Collation must account for section order and spine width.
  Equipment: Case-binding collators with section trays (e.g., Muller Martini, Bobst) or manual gathering tables.
  Key Considerations:
  
• Section alignment for sewing or adhesive binding.
• Spine thickness



Collation in Digital vs. Offset Printing: Technical Differences

Collation processes differ significantly between digital and offset printing due to variations in paper handling mechanics, ink adhesion properties, and workflow automation. While digital printing leverages electronic control for precision, offset lithography relies on mechanical precision and manual intervention for multi-sheet collation. These differences influence accuracy, efficiency, and error rates, particularly in high-volume production where misfeeds or ink smudging can disrupt workflows.

The technical disparities stem from the fundamental design of each printing method: digital systems (toner-based or inkjet) use electrostatic or piezoelectric ink deposition, whereas offset printing transfers ink via rubber blankets to paper. These distinctions impact collation steps, error susceptibility, and software-driven automation. Below, the comparative analysis focuses on paper handling, ink behavior, and workflow configurations to highlight practical and operational differences.


Paper Handling and Ink Adhesion in Collation

Digital printing systems, including toner-based (laser) and inkjet printers, employ automated paper paths with sensors to detect misfeeds or jams during collation. Toner particles adhere electrostatically to paper fibers, reducing smudging risks during stacking but requiring precise registration to prevent misalignment. Inkjet printers, particularly those using aqueous inks, may experience ink spread if collation occurs before full drying, leading to bleed-through or smudging in multi-sheet stacks.

In contrast, offset lithography relies on mechanical collation units that physically align and staple sheets. The ink in offset printing—typically oil-based—dries slower than toner or inkjet inks, increasing the risk of smudging if sheets are stacked too soon. Additionally, offset collation often involves heavier paper stocks (e.g., 120–300 gsm), which require robust handling mechanisms to avoid bending or misalignment during stapling.

Key Considerations:


• Digital Printing: Paper handling is optimized for high-speed, single-pass collation with minimal human intervention. Sensors trigger alerts for misfeeds, and software compensates for minor registration errors.
• Offset Printing: Collation is a post-press step, where sheets are manually or mechanically aligned before stapling. Ink drying times must be monitored to prevent smudging, especially in humid environments.

Comparative Collation Workflow: Digital vs. Offset

The following table outlines the distinct collation steps, challenges, and common errors encountered in digital and offset printing workflows.


Printing Method	Collation Step 1	Collation Step 2	Common Errors
Digital (Toner-Based)	Automated sheet delivery with inline stapling or saddle-stitching. Paper sensors verify alignment before stacking.	Software-driven collation (e.g., Adobe Acrobat PDF/X-4) validates page order and imposition before printing.	Misaligned staples due to paper curl or static buildup. Incomplete collation if the printer buffer overflows during high-volume runs. Toner smudging from improper fuser settings or high humidity.
Digital (Inkjet)	Collation occurs post-print, with sheets fed into a finisher module for stapling or folding. Ink drying units may be integrated.	RIP (Raster Image Processor) presets adjust drying times to prevent ink spread during collation.	Ink smudging if collation begins before full drying (common in aqueous inkjet). Paper jams in high-speed finishers due to uneven sheet edges. Color misregistration if the printer’s collation software lacks advanced imposition tools.
Offset Lithography	Sheets are delivered to a collation table, where operators manually align stacks by page order.	Mechanical staplers or saddle-stitchers bind sheets, with operators inspecting for ink smudges or misfeeds.	Misaligned staples from uneven sheet stacking or stapler miscalibration. Ink smudging due to prolonged contact between wet ink and adjacent sheets. Page order errors from manual sorting, especially in long runs (e.g., 16+ pages).

Software Configurations for Automated Collation in Digital Printing

Digital printing workflows rely on software to automate collation, reducing human error and improving consistency. Key tools include Adobe Acrobat Pro, prepress RIPs (e.g., EFI Fiery, Kodak Prinergy), and printer-specific control panels. These systems validate page order, imposition, and binding requirements before printing.

Critical Software Settings:


• Adobe Acrobat Pro:
• PDF/X-4 Compliance: Ensures preflight checks for correct page sequencing and bleed settings.
• Preflight Profiles: Detects misaligned text or images that could disrupt collation.
• Output Preview: Simulates collation to verify staple placement and page order.

• Troubleshooting Tip: Enable the "Simulate Print" function in Acrobat to preview collation accuracy without wasting materials.

• RIP Presets:
• Drying Time Adjustments: For inkjet printers, RIPs like EFI Fiery optimize drying parameters to prevent smudging during collation.
• Collation Modules: Advanced RIPs (e.g., Kodak Prinergy) include automated collation logic for saddle-stitching or booklet-making.
• Paper Path Calibration: Digital presses (e.g., Xerox iGen, HP Indigo) allow calibration of paper sensors to minimize misfeeds.

Common Software-Related Errors and Fixes:


• Misfeeds: Caused by incorrect paper size settings in the RIP. Solution: Recalibrate the paper path and verify DPI/resolution settings.
• Incomplete Collation: Occurs when the printer buffer is overwhelmed. Solution: Reduce print speed or split jobs into smaller batches.
• Staple Misalignment: Often linked to improper imposition. Solution: Use Adobe’s "Booklet Maker" plugin to validate staple positioning.

Step-by-Step Manual Collation for a 16-Page Offset-Printed Booklet

Manual collation in offset printing requires precision, particularly for multi-page booklets where stapling must align with the fold. Below is a standardized procedure for collating a 16-page booklet (8 leaves) from offset-printed sheets, including safety measures for handling heavy stacks.

Preparation:


• Materials Required:
• Offset-printed sheets (e.g., 210 × 297 mm for A4 booklets).
• Stapler with long staples (e.g., 12–16 mm for 8 leaves).
• Collation table with non-slip surface.
• Safety gloves and a dust mask (for ink residue).
• Metal ruler and pencil for alignment.

Procedure:

1. Sorting and Stacking:


• Arrange printed sheets in numerical order (Page 1 on top, Page 16 at the bottom).

• Critical Step: Verify the backside of each sheet for ink smudges or misprints before stacking. Use a bright light to detect hidden defects.

• Stack sheets in sets of 4 (for 16 pages total), ensuring the spine edge (fold line) is aligned uniformly.

2. Alignment and Stapling:


• Place the first stack of 4 sheets on the collation table, spine edge flush with the table’s edge.
• Use a metal ruler to ensure all sheets extend equally beyond the table’s edge.
• Insert staples 3–5 mm from the spine edge (adjust based on booklet thickness). For 8 leaves, use two staples per stack (top and bottom).
• Press the stapler firmly to avoid bent staples. Test the staple pull to ensure it holds the stack securely.

3. Inspection:


• Open the stapled stack to verify:
• Pages are in correct order (Page 1 visible on the outside, Page 16 inside).
• No ink smudging between leaves.
• Staples are parallel and centered.

• Safety Note: Wear gloves to avoid ink transfer to skin, and use a dust mask if handling large batches to prevent inhalation of paper dust.

4. Final Assembly:

• Fold the stapled

Common Collation Errors and Corrective Actions in Printing

Collation errors in printing disrupt workflow efficiency, increase waste, and elevate production costs by necessitating rework or scrapping defective batches. These mistakes often stem from mechanical failures, human oversight, or misconfigured prepress settings. Identifying frequent collation issues and implementing systematic corrective measures ensures compliance with quality standards and minimizes operational disruptions. Below are structured insights into prevalent errors, detection methods, and preventive strategies, including a decision-making framework for error resolution.


Five Common Collation Errors and Their Corrective Measures

Collation inaccuracies manifest in various forms, each requiring distinct diagnostic and remedial approaches. The following table categorizes five frequent errors by their observable symptoms, underlying causes, and actionable fixes, emphasizing proactive maintenance and operator training.


Error	Symptom	Root Cause	Fix
Page Sequence Errors	Pages appear out of order (e.g., Page 4 follows Page 2), or signatures are misaligned within sections. Example: A 16-page booklet displays pages 1-8 in correct order, but pages 9-16 are reversed.	Incorrect sheet-fed or sheet-let configuration in the collator. Improperly set up gatherer or folder modules. Human error during manual collation (e.g., misaligned stacks). Software-generated PDFs with embedded but misordered page labels.	Verify collator settings against the job ticket; recalibrate gatherer/folder modules. Run a test collation with a sample signature to validate sequence. Use pre-flight tools to check PDF page order and bookmarks. Train operators on signature alignment using visual guides.
Staple Misalignment or Missing Staples	Staples are crooked, positioned off-center, or entirely absent in finished signatures. Example: A 48-page brochure has staples placed 5mm from the left edge instead of centered.	Worn or improperly adjusted stapling heads. Inconsistent sheet thickness causing binding misalignment. Collator stapler feed mechanism jams or skips cycles. Operator failure to reset staple position after format changes.	Inspect and replace worn stapling components; lubricate moving parts. Adjust staple position using a template aligned to the signature’s spine. Test staple function on blank sheets before full production. Implement a checklist for staple alignment verification.
Sheet Gathering Mismatches	Pages from different signatures are incorrectly paired (e.g., a front cover matches with an interior page from a different section). Example: A magazine’s first issue’s cover is collated with the second issue’s page 3.	Improperly stacked or misfed sheets in the gatherer. Collator’s register marks misaligned with sheet edges. Software-generated imposition errors in the PDF. Operator error during manual gathering (e.g., swapping stacks).	Use color-coded sheet trays or labels to match signatures. Verify imposition settings in prepress software (e.g., Adobe InDesign’s "Book" feature). Conduct a visual inspection of gathered signatures before folding. Implement a "first-in, first-out" (FIFO) stacking protocol.
Incomplete or Over-Collated Signatures	Signatures lack pages (e.g., a 16-page booklet missing pages 5-8) or include duplicate pages. Example: A 32-page catalog has two copies of page 12 in every signature.	Collator’s sheet counter malfunction or misconfiguration. Improperly trimmed or damaged sheets causing feeding errors. Software-generated PDFs with duplicate pages or missing spreads. Operator failure to reset collator settings for new batch sizes.	Calibrate the collator’s sheet counter and test with a known quantity. Inspect sheets for defects; replace damaged trays or feed rollers. Use pre-flight tools (e.g., Enfocus PitStop) to validate page counts. Document batch sizes and collator settings for traceability.
Fold and Bind Defects	Pages are improperly folded (e.g., creases misaligned, spine gaps), or signatures fail to bind securely. Example: A saddle-stitched booklet’s spine splits open when pages are fanned.	Incorrect fold register settings in the folder module. Inconsistent sheet thickness causing binding stress. Stapler or stitcher misalignment with fold creases. Excessive moisture or humidity affecting paper properties.	Adjust folder register marks using a precision ruler and test sheets. Use consistent paper stocks and monitor environmental conditions (e.g., 50% humidity). Align stapler/spine with fold creases via laser guides. Pre-condition paper in climate-controlled storage before printing.

Proof Sheet Inspection for Collation Error Detection

Proof sheets serve as a critical quality control tool to identify collation errors before full-scale production. A well-structured proof sheet includes critical markers that align with the final printed output, allowing operators to verify sequence, alignment, and binding integrity. Below is a sample proof sheet description with essential annotations:

Proof Sheet Layout for Collation Verification
1. Signature Mockup: A scaled-down representation of the final signature, labeled with page numbers and fold creases.


• Example: For a 16-page booklet, display pages 1, 4, 8, and 16 to verify sequence and alignment.
2. Staple/Bind Position Indicators: Dashed lines or X-marks showing the exact location of staples or stitches.

• Example: A red "S" symbol centered 10mm from the spine edge for saddle stitching.
3. Register Marks: Crosshairs or alignment guides for fold and cut lines, ensuring consistency with the collator’s settings.

• Example: A 5mm crosshair at the fold line for precision creasing.
4. Page Sequence Checklist: A numbered list of pages to confirm completeness (e.g., "Pages 1-16: ✓").
5. Color and Bleed Verification Zones: Highlighted areas for CMYK color accuracy and bleed extensions.

• Example: A 3mm bleed zone marked with a yellow border.

Process for Proof Sheet Inspection


• Step 1: Print a single proof sheet using the same paper stock and collator settings as the production run.
• Step 2: Compare the proof sheet against the digital imposition file for page order, alignment, and binding markers.
• Step 3: Use a magnifying glass to inspect staple positions and



Advanced Collation Techniques for Specialized Projects

Collation in printing transcends standard workflows when applied to high-complexity projects, where precision, material variability, and dynamic content demand tailored methodologies. Specialized collation adapts to multi-language publications, variable data applications, and artisanal materials, requiring integration of binding techniques, automated sorting, and manual oversight. These adaptations ensure structural integrity, aesthetic cohesion, and functional usability, particularly in projects where traditional collation methods fall short.

Advanced collation techniques address three primary domains: multi-language publications with divergent page counts, variable data printing (VDP) where content varies per copy, and artisanal or high-end materials that alter handling and assembly. Each domain introduces unique challenges—such as section misalignment, dynamic sorting errors, or material fragility—that necessitate hybrid approaches combining automation, custom tooling, and artisan expertise.


Collation for Multi-Language Publications with Variable Page Counts

Multi-language editions, such as bilingual or trilingual books, often feature sections with differing page totals due to translation length discrepancies or supplementary content (e.g., glossaries, cultural notes). Collation must account for these variations while maintaining sequential order, binding compatibility, and visual symmetry.

Key Considerations:


• Section Segmentation: Divide the publication into logical units (e.g., chapters, appendices) where each unit can be collated independently before final assembly. For example, a 200-page English edition paired with a 240-page Spanish edition may require collating the shared front matter (e.g., title pages, TOC) separately from variable chapters.
• Binding Adaptations:
• Saddle-Stitch Limitations: Short-run saddle-stitched books may struggle with page count mismatches, risking misaligned signatures. Solutions include:
• Dummy Books: Pre-assemble signatures for each language to verify alignment before full collation.
• Section Binding: Use perfect binding or case binding for variable sections, allowing independent spine adjustments.
• Thread Count Adjustments: For sewn bindings, adjust thread tension or use reinforced signatures to accommodate thicker sections.
• Signature Planning:
• Modular Signatures: Design signatures to include only shared content (e.g., front matter) in early signatures, with later signatures dedicated to language-specific pages.
• Placeholder Pages: Insert blank or placeholder pages in shorter sections to balance signature thickness during preliminary collation.

Example Workflow for a Bilingual Art Book:
1. Pre-Collation Audit: Verify page counts per language (e.g., English: 128 pages; French: 144 pages).
2. Signature Design:


• Signature 1: Shared content (8 pages: title, copyright, TOC).
• Signatures 2–5: English chapters (32 pages total).
• Signatures 6–7: French chapters (40 pages total), with 8 blank pages added to balance thickness.
3. Collation Phases:

• Collate shared signatures first, then language-specific signatures.
• Use color-coded stacks for each language to prevent cross-contamination.
4. Binding: Employ hardcover case binding with adjustable spine slots to accommodate thickness variations.


Collation in Variable Data Printing (VDP)

Variable Data Printing (VDP) introduces dynamic content—such as personalized text, images, or barcodes—where each printed copy may have unique page sequences or missing elements. Traditional collation methods, reliant on fixed signatures, fail in VDP environments, necessitating real-time sorting, modular assembly, and post-print verification.

Core Challenges and Solutions:


• Dynamic Page Sequences:
• Problem: Personalized inserts (e.g., coupons, QR codes) may alter page order or introduce gaps.
• Solution: Implement post-print collation stations with:
• Barcode/QR Verification: Scan each sheet to validate content before sorting.
• Modular Trays: Use trays labeled by VDP job ID and page sequence (e.g., "Job #4567 – Pages 1-8 + Insert A").
• Sorting Algorithms:
• Automated Feeders: High-speed collators with optical character recognition (OCR) or RFID tags to detect and sort variable elements.
• Manual Override Stations: For complex jobs, assign operators to visually inspect and reorder misaligned sheets.
• Binding Compatibility:
• Saddle-Stitch: Avoid for VDP unless inserts are pre-collated into signatures.
• Perfect Binding: Use adhesive application stations to bind variable-thickness stacks, with spine reinforcement for inserts.
• Digital Booklets: For ultra-variable content, fold and collate individual booklets (e.g., 8-page inserts) before final assembly.

Case Study: Personalized Educational Workbooks


• Project: 50,000 copies of a math workbook with:
• 48 core pages + 4 variable inserts (quizzes, answer keys).
• Inserts varied by region (e.g., metric vs. imperial units).
• Collation Process:
1. Pre-Press: Design signatures with placeholder slots for inserts.
2. Printing: Core content printed in batches; inserts printed separately with job-specific barcodes.
3. Collation:

• Automated Sorter: Feeds sheets into bins labeled by barcode regions.
• Human Verification: Operators insert quizzes into pre-marked slots.
4. Binding: Perfect binding with UV coating to secure variable inserts.


Collation for Artisanal and Rare Paper Types

High-end art books often feature handmade papers, textured substrates, or embossed covers, which introduce physical challenges:

• Slippage: Textured papers resist smooth feeding in collators.
• Fragility: Handmade papers may tear under pressure from automated equipment.
• Weight Variations: Thicker papers (e.g., 12pt cotton rag) alter signature balance.

Adaptive Techniques:


• Manual Collation with Assistive Tools:
• Weighted Feeders: Use gravity-fed trays with adjustable pressure to prevent jams.
• Silk-Screened Guides: Apply temporary alignment marks on signatures to aid stacking.
• Binding-Specific Adjustments:
• Japanese Stab Binding: Ideal for fragile papers; collate sheets one at a time with hand-sewn stitches.
• Linen-Wrapped Boards: For embossed covers, use custom clamps to prevent deformation during collation.
• Environmental Controls:
• Humidity Regulation: Maintain 45–55% humidity to reduce paper warping.
• Anti-Static Mats: Prevent static cling in textured papers.

Case Study: Limited-Edition Art Book with Handmade Arches Paper


• Project: 200 copies of an artist’s portfolio using 100% cotton rag paper (12pt) with debossed covers.
• Collation Challenges:
• Paper weight caused signature misalignment in automated collators.
• Debossed covers required precise stacking to avoid crushing embossing.
• Solution:
• Hybrid Collation:
• Front Matter (8 pages): Collated manually with wooden alignment guides.
• Art Plates (32 pages): Assembled in small batches using a low-pressure folder-gluer.
• Binding: Coptic stitching with linen tape to distribute stress evenly.
• Finishing: Hand-numbered and spot-varnished edges to preserve texture.

Special Project Collation Table: Challenges and Solutions

Special Project Type	Collation Challenge	Solution Used	Equipment Required
Bilingual Academic Text (English/Spanish)	Page count mismatch (180 vs. 210 pages); saddle-stitch binding risk	Segmented collation: Shared front matter (16 pages) collated first. Language-specific sections bound separately with perfect binding. Spine reinforcement for thicker sections.	Muller Martini 102 Perfect Binder Color-coded sorting trays Digital scale for signature weight verification
Variable Data Direct Mail (Personalized Coupons)	Dynamic inserts (4–6 pages per copy) Collation is far more than a mechanical step in printing—it is the silent architect of order in a process where precision meets creativity. Mastering its techniques, from automated sorting systems to manual adjustments for niche projects, ensures that every printed piece meets quality standards while adapting to evolving demands. Whether addressing common errors through pre-flight checks or tackling complex challenges like variable data printing, the principles of collation remain constant: clarity in workflows, attention to detail, and an understanding of how materials interact. As printing technology advances, the role of collation will continue to evolve, reinforcing its indispensable place in producing materials that are not only visually compelling but also structurally sound. FAQ What does "collate" mean in printing settings? "Collate" in printing settings refers to whether multiple copies of a multi-page document are printed in order (e.g., pages 1-2-3-4 for each copy) or if all pages are printed sequentially for the first copy, then the second, etc. When enabled, it ensures each copy has all pages in the correct sequence. What does the "collate" option do in printing? The "collate" option controls how pages are distributed across multiple copies. If turned on, the printer outputs complete sets (e.g., all pages of the first copy before moving to the second). If off, pages are printed in order but may be out of sequence per copy (e.g., page 1 of all copies first, then page 2). What does "collate" mean when printing 2 copies? With collate enabled, printing 2 copies of a 4-page document will produce two separate sets of pages 1-2-3-4. Without collate, the printer outputs page 1 (copy 1), page 1 (copy 2), then page 2 (copy 1), page 2 (copy 2), and so on, mixing the copies. What does "collate" mean when printing copies? Collate ensures that each printed copy of a multi-page document contains all pages in the correct order. Without collate, the printer may distribute pages across copies sequentially (e.g., page 1 of all copies first), requiring manual sorting afterward. What does "collate" mean when printing multiple copies? Collate groups pages into complete sets for each copy. For example, printing 3 copies of a 6-page document with collate on produces three ordered sets of 1-2-3-4-5-6. Without it, pages are printed in order but spread across copies (e.g., all page 1s first, then all page 2s). What does "collate" mean when printing a PDF? In PDF printing, collate determines whether pages are printed in sequence per copy (collated) or distributed across copies (uncollated). For a 10-page PDF with 2 copies, collate on prints two full sets of 1-10; off prints pages 1-10 for copy 1, then repeats 1-10 for copy 2. collation-techniques document-assembly offset-vs-digital-printing printing-processes production-workflows Leave a Comment Name Comment Post Comment Comments are moderated before appearing. The data you submit is processed according to the Privacy Policy of Voltefac.